Please note that this guide is provided as a general reference and in no way constitutes an official recommendation. We constantly update this list to cover more Mercedes -Benz 722.9 transmission error codes.
Some error codes may appear multiple times in this table.
| Error Code | Fault Code Description | Repair Measure | Note |
| P0741 | Actuation of torque converter lockup clutch is not possible | Inspect and clean metal debris in the oil pan, flush transmission oil circuit. Replace torque converter, clutch(replace with pistons), valve body or gears if needed | Torque converter lockup clutch and/or rear satellite gear and/or pistons mechanical malfunction |
| P2783 | The friction power of the torque converter lockup clutch is too high | Inspect and clean metal debris in the oil pan, flush transmission oil circuit. Replace torque converter, clutch(replace with pistons), valve body or gears if needed | Torque converter lockup clutch and/or rear satellite gear and/or pistons mechanical malfunction |
| P2511 | The friction power of the torque converter lockup clutch is too high | Inspect and clean metal debris in the oil pan, flush transmission oil circuit. Replace torque converter, clutch(replace with pistons), valve body or gears if needed | Torque converter lockup clutch and/or rear satellite gear and/or pistons mechanical malfunction |
| P2711 | Hydraulic fault in transmission (engaging shift element does not engage) | Inspect and clean metal debris in the oil pan, flush transmission oil circuit. Replace torque converter, clutch(replace with pistons), valve body or gears if needed | Torque converter lockup clutch and/or rear satellite gear and/or pistons mechanical malfunction |
| P2502 | The gear is implausible or the transmission is slipping | Inspect and clean metal debris in the oil pan, flush transmission oil circuit. Replace torque converter, clutch(replace with pistons), valve body or gears if needed | Torque converter lockup clutch and/or rear satellite gear and/or pistons mechanical malfunction |
| P2504 | Hydraulic fault in transmission (disengaging shift element does not disengage) | Inspect and clean metal debris in the oil pan, flush transmission oil circuit. Replace torque converter, clutch(replace with pistons), valve body or gears if needed | Torque converter lockup clutch and/or rear satellite gear and/or pistons mechanical malfunction |
| P2505 | Gear not engaged or transmission slipping | Inspect and clean metal debris in the oil pan, flush transmission oil circuit. Replace torque converter, clutch(replace with pistons), valve body or gears if needed | Torque converter lockup clutch and/or rear satellite gear and/or pistons mechanical malfunction |
| P0778 | The internal electrical check of component Y3/8y5 (B1 brake control solenoid valve (VGS)) has failed | Replace transmission valve body | |
| P2734 | The internal electrical check of component Y3/8y3 (K2 clutch control solenoid valve (VGS)) has failed. | Replace transmission valve body | |
| P2810 | The internal electrical check of component Y3/8y1 (Working pressure control solenoid valve (VGS)) has failed | Replace transmission valve body and TCU | |
| P2716 | The internal electrical check of component Y3/8y4 (K3 clutch control solenoid valve (VGS)) has failed | Replace transmission valve body | |
| P0894 | The gear is implausible or the transmission is slipping | Check transmission oil path and filters for blockage. Replace filter, solenoid/valve body, clutch(replace with pistons) when needed | |
| P0733 | The gear is implausible or the transmission is slipping | Check transmission oil path and filters for blockage. Replace filter, solenoid/valve body when needed | |
| P2110 P2111 P2112 P2113 P2114 P2115 P2116 P2117 P0748 P0798 P2725 P2759 | Inspect valve body and solenoids for blockage and short/open circuited solenoid. Replace transmission valve body when needed | ||
| P0705 | Component Y3/8s1 selection range sensor is defective | Replace TCU or Y3/8S1 sensor | |
| P0717 | The signal from component (sensor) Y3/8n1 is not available | Replace TCU or Y3/8N1 sensor | |
| P0718 | Component (sensor) Y3/8n1 is defective | Replace TCU or Y3/8N1 sensor | |
| P0720 | Output speed sensor circuit malfunction | Replace TCU | |
| P0721 | The transmission output speed signal is implausible, when compared to the wheel RPM signal | Replace TCU | Please also inspect the clip of the middle shaft. If the clip came loose, replace the bearing, clip, and oil pan. |
| P0722 | Output speed sensor no signal | Replace TCU | Please also inspect the clip of the middle shaft. If the clip came loose, replace the bearing, clip, and oil pan. |
| P0723 | Output speed sensor is defective | Replace TCU | |
| P2200 | The signal from component (sensor) Y3/8n2 is not available | Replace TCU or Y3/8N2 sensor | |
| P2201 | Component (sensor) Y3/8n2 is defective | Replace TCU or Y3/8N2 sensor | |
| P2204 | The signal from component (sensor) Y3/8n1 is not available | Replace TCU or Y3/8N2 sensor | |
| P2205 | Component (sensor) Y3/8n1 is defective | Replace TCU or Y3/8N2 sensor | |
| P2206 | The signal from component (sensor) Y3/8n3 is not available | Replace TCU or Y3/8N3 sensor | |
| P2207 | The value of component Y3/8n3 is implausible | Replace TCU or Y3/8N3 sensor | |
| P2550 | Component (sensor) Y3/8n3 is defective | Replace TCU or Y3/8N3 sensor | |
| P2716 | Pressure control solenoid electrical | Replace TCU | |
| P2767 | The signal from component (sensor) Y3/8n2 is not available | Replace TCU or Y3/8N2 sensor | |
| P2768 | Component (sensor) Y3/8n2 is defective | Replace TCU or Y3/8N2 sensor |